KR101762625B1 - Device for detecting door opening and closing using nfc tag and security system including the same - Google Patents

Device for detecting door opening and closing using nfc tag and security system including the same Download PDF

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Publication number
KR101762625B1
KR101762625B1 KR1020150148498A KR20150148498A KR101762625B1 KR 101762625 B1 KR101762625 B1 KR 101762625B1 KR 1020150148498 A KR1020150148498 A KR 1020150148498A KR 20150148498 A KR20150148498 A KR 20150148498A KR 101762625 B1 KR101762625 B1 KR 101762625B1
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South Korea
Prior art keywords
signal
nfc
door
closing
nfc tag
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KR1020150148498A
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Korean (ko)
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KR20170047874A (en
Inventor
심동보
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주식회사 호서텔넷
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Publication of KR20170047874A publication Critical patent/KR20170047874A/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00571—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by interacting with a central unit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/016—Personal emergency signalling and security systems

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Lock And Its Accessories (AREA)
  • Alarm Systems (AREA)

Abstract

A door opening / closing determination device using an NFC tag includes an NFC transceiver, a memory, a key generator for generating an encryption key, an ID generator for generating and storing the ID of the first NFC tag, reading the ID from the memory, An NFC transceiver for transmitting the encrypted ID to the NFC transceiver for encrypting the ID and writing the encrypted ID to the first NFC tag; and a transmitter for receiving a response signal through the NFC transceiver, An NFC reader that decodes the response signal, compares the decoded response signal with the ID, and generates an acknowledgment signal indicating whether the door is opened or closed according to a result of the comparison; and an NFC reader capable of communicating with a wireless access point capable of communicating with the server A wireless communication module, and an NFC writer and an NFC reader, Wherein the notification signal corresponding to the personal number comprises a controller that is transmitted to the wireless communication module.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for checking whether a door is opened and closed using an NFC tag, and a security system including the same.

An embodiment according to the concept of the present invention relates to an apparatus for confirming whether a door is opened or closed using an NFC (Near Field Communication) tag, and more particularly, The present invention relates to a door opening / closing confirmation device for controlling the operation of an alarm on the basis of an opening / closing signal, and a security system including the same.

The conventional door opening / closing detector determines that the door is open when a magnet installed at the door is separated from the door. Such a magnetic door opening / closing detector can disable the function of the magnetic door opening / closing detector by using an obstacle magnet even if the access is not allowed.

To overcome such disadvantages, there is a problem in that a complicated structure of electronic circuits is required to manufacture a sensor having immunity to disturbing magnets, and the manufacturing cost of the electronic circuits increases.

1. Registration Patent Publication No. 10-0696273 (Published on March 12, 2007) 2. Open Patent Publication: Publication No. 10-2011-0095577 (Published Aug. 25, 2011)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and apparatus for transmitting a periodic detection signal to an NFC tag installed at a door, receiving a response signal including an ID encrypted from the NFC tag, And a control unit for controlling the operation of the alarm on the basis of whether the opening and closing of the door is normal or not based on the checked opening and closing state and the opening and closing signals output from the door opening and closing apparatus, System.

An apparatus for checking whether a door is opened or closed through communication with a first NFC tag installed in a door according to an embodiment of the present invention includes an NFC transceiver, a memory, a key generator for generating a cryptographic key, An ID of the first NFC tag is generated and stored in the memory, the ID is read out from the memory, the ID is encrypted using the encryption key, the encryption is performed to write the encrypted ID in the first NFC tag, An NFC transceiver for receiving the response signal through the NFC transceiver, decoding the response signal using the encryption key, comparing the decoded response signal with the ID, An NFC reader for generating an acknowledgment signal indicating whether or not the door is opened or closed according to the received information, a wireless access point capable of communicating with the server, Controlling any one of the enable from the wireless communication module and the NFC writer and the NFC reader, which can communicate, and a controller for transmitting a notification signal corresponding to the confirmation signal to the wireless communication module.

When the response signal is a signal transmitted from the first NFC tag and the decoded ID included in the decoded response signal matches the ID, the NFC reader generates the confirmation signal indicating the closing of the door, The controller may transmit the notification signal corresponding to the confirmation signal indicating the closing of the door to the wireless communication module.

When the response signal is a signal transmitted from a second NFC tag different from the first NFC tag, and the decoded ID included in the decoded response signal is different from the ID, the NFC reader transmits the acknowledgment And the controller may transmit the notification signal corresponding to the confirmation signal indicating the contact of the unregistered NFC tag to the wireless communication module.

The controller can control the operation of the alarm in response to the alarm signal received via the wireless communication module. When the response signal is a signal reflected from an object and the decoded ID included in the decoded response signal is different from the ID, the NFC reader generates the confirmation signal indicating opening of the door, The notification signal against the confirmation signal indicating opening of the door can be transmitted to the wireless communication module.

The controller may receive an open / close signal output from an entrance door opening / closing device for controlling the opening / closing of the door, and may transmit the opening / closing signal and the notification signal to the wireless communication module. The controller can control the operation of the alarm in response to the alarm signal received via the wireless communication module. The door opening / closing confirmation device may further include a random number generator for generating a random number using a secret value, and the key generator may generate the encryption key using the random number.

The security system for determining whether the door is opened or closed through communication with a first NFC tag installed at a door according to an embodiment of the present invention includes a wireless access point capable of wireless communication with the door opening / And a server capable of communicating with the access point via a network, wherein the door opening / closing confirmation device comprises: an NFC transceiver; a memory; a key generator for generating a cryptographic key; And for transmitting the encrypted ID to the NFC transceiver for writing the encrypted ID in the first NFC tag, the NFC transceiver for reading the encrypted ID from the memory, Writer, receives the response signal through the NFC transceiver, decodes the response signal using the encryption key An NFC reader that compares the decoded response signal with the ID and generates an acknowledgment signal indicating whether the door is open or closed according to a result of the comparison; a wireless communication module that performs wireless communication with the wireless access point; And a controller for controlling an enable of the NFC reader and transmitting a notification signal corresponding to the confirmation signal to the wireless communication module.

When the response signal is a signal transmitted from the first NFC tag and the decoded ID included in the decoded response signal matches the ID, the NFC reader generates the confirmation signal indicating the closing of the door, The controller transmits the notification signal corresponding to the confirmation signal indicating the closing of the door to the wireless communication module and the response signal is a signal transmitted from a second NFC tag different from the first NFC tag, When the included decoded ID and the ID are different from each other, the NFC reader generates the confirmation signal indicating the contact of the unregistered NFC tag, and the controller notifies the notification Transmits a signal to the wireless communication module, and the response signal is a signal reflected from the object The NFC reader generates the confirmation signal indicating the opening of the door when the decoded ID included in the base decoded response signal is different from the ID, And transmits the notification signal to the wireless communication module.

The server responds to the notification signal corresponding to the confirmation signal indicating the contact of the unregistered NFC tag received via the network with the wireless access point or the notification signal corresponding to the confirmation signal indicating the opening of the door And the controller is capable of operating the alarm in response to the alarm signal received via the network, the wireless access point, and the wireless communication module. The server may transmit an alarm message corresponding to the alarm signal to the wireless communication device.

The door opening / closing determination device according to an embodiment of the present invention identifies an NFC tag through an encrypted ID and prevents an attempt to open a door using another NFC tag because the alarm operates when an unregistered NFC tag is accessed. Since the ID of the tag is encrypted and used, the NFC tag can not be copied by another user.

The door opening / closing confirmation device according to an embodiment of the present invention uses an NFC tag that can be realized in a very thin form, so that it can be easily installed in a door opening.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to more fully understand the drawings recited in the detailed description of the present invention, a detailed description of each drawing is provided.
1 shows a security system according to an embodiment of the present invention.
Fig. 2 shows a table for explaining the operation of the security system shown in Fig.
3 is a block diagram of a door opening / closing confirmation device according to an embodiment of the present invention.
4 is a flowchart illustrating an operation of the door opening / closing confirmation device shown in FIG.

It is to be understood that the specific structural or functional description of embodiments of the present invention disclosed herein is for illustrative purposes only and is not intended to limit the scope of the inventive concept But may be embodied in many different forms and is not limited to the embodiments set forth herein.

The embodiments according to the concept of the present invention can make various changes and can take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. It should be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms disclosed, but includes all modifications, equivalents, or alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the right according to the concept of the present invention, the first element may be referred to as a second element, The component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like are used to specify that there are features, numbers, steps, operations, elements, parts or combinations thereof described herein, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto.

1 shows a security system according to an embodiment of the present invention. 1, the security system 10 includes a door opening / closing confirmation device 100, a first NFC tag 200, a door opening / closing device 300, a wireless access point 400, and a server 500 .

The door opening / closing confirmation apparatus 100 may be installed in the door frame so as to be close to the edge of the door. In FIG. 1, the door opening / closing confirmation apparatus 100 is shown installed on the door frame. However, the location of the door opening / closing confirmation device 100 and the shape of the door opening / closing confirmation device 100 are not limited to those shown in FIG.

The first NFC tag 200 may be installed at the entrance door so as to be close to the door opening / closing confirmation device 100. At this time, the face of the first NFC tag 200 where the NFC antenna is located faces the door opening / closing confirmation device 100.

The door opening / closing confirmation device 100 can recognize the first NFC tag 200 through a scan or a tagging. The door opening / closing determination apparatus 100 periodically transmits a detection signal to the first NFC tag 200 and receives a response signal to the detection signal from the first NFC tag 200, Can be recognized.

The door opening / closing confirmation apparatus 100 may be connected to the door opening / closing apparatus 300 installed at the door to receive the door opening / closing signal by wire or wirelessly.

Since the output signal of the door opening / closing confirmation device 100 is transmitted to the server 500 through the wireless access point 400, the door opening / closing confirmation device 100 can be wirelessly connected to the wireless access point 400 . For example, the door opening / closing confirmation device 100 may be connected to the wireless access point 400 through various wireless communication methods such as Wi-Fi (wireless fidelity), bluetooth, or zigbee.

The door opening / closing confirmation device 100 recognizes the first NFC tag 200 using NFC (near field communication), and transmits an acknowledgment signal generated based on whether the door is opened or closed and an acknowledgment signal received from the door opening / And transmit the open / close signal to the wireless access point 400.

The door opening / closing confirmation device 100 can receive an alarm signal from the server 500 through the wireless access point 400 and operates the alarm in the door opening / closing confirmation device 100 in response to the alarm signal . The wireless access point 400 and the server 500 may communicate with each other via a network, e.g., a wired network or a wireless network.

Fig. 2 shows a table for explaining the operation of the security system shown in Fig. Referring to FIGS. 1 and 2, the door opening / closing confirmation apparatus 100 can communicate with the first NFC tag 200 (CASE 1 in FIG. 2), communicate with the second NFC tag 200-1 (CASE 2 in FIG. 2). Here, it is assumed that the first NFC tag 200 means a tag registered in advance, and the second NFC tag 200-1 means a tag not registered in advance.

When the door is opened, even if the door opening / closing confirmation device 100 transmits a detection signal, there is no NFC tag to receive the detection signal. Therefore, the door opening / closing confirmation device 100 can detect whether the door Signal may be received. At this time, when the door is opened by a normal method, the automatic door opening / closing apparatus 300 can output an opening / closing signal indicating door opening (CASE 3 in FIG. 2), and when the door is opened in an abnormal manner, The device 300 may output an open / close signal indicating door closing (CASE 4 in FIG. 2).

When the door opening / closing confirmation device 100 can communicate with the first NFC tag 200 (CASE 1), the door opening / closing confirmation device 100 transmits a detection signal to the first NFC tag 200, And receive a response signal for the detection signal from the tag 200. The response signal may include an encrypted identification (ID) output from the first NFC tag 200. The ID may mean an ID code.

The door opening / closing confirmation apparatus 100 can receive the ID of the first NFC tag 200 by receiving and decoding the response signal including the encrypted ID from the first NFC tag 200. The door opening / closing confirmation device 100 can compare the decrypted ID with the ID stored in the door opening / closing confirmation device 100. As a result of comparison, if the ID and the stored ID coincide with each other, the door opening / closing confirmation apparatus 100 receives the ID of the registered NFC tag (i.e., the first NFC tag) and generates a notification signal indicating the closing of the door And transmit the notification signal to the wireless access point 400. The wireless access point 400 may transmit the notification signal to the server 500 via the network.

In Case 1 (CASE 1), the server 500 does not transmit an alarm signal to the door opening / closing confirmation device 100. Therefore, the alarm of the door opening / closing confirmation apparatus 100 does not operate.

When the door opening / closing confirmation device 100 can communicate with the second NFC tag 200-1 (CASE 2), the door opening / closing confirmation device 100 transmits a detection signal to the second NFC tag 200-1 And can receive a response signal for the detection signal from the second NFC tag 200-2.

The door opening / closing confirmation apparatus 100 can receive and decode the response signal including the ID output from the second NFC tag 200-1 and obtain the ID of the second NFC tag 200-1. The door opening / closing confirmation device 100 compares the decrypted ID with the ID stored in the door opening / closing confirmation device 100, and if they do not match, the ID of the unregistered NFC tag is received. 100 may generate a notification signal indicating the contact of the unregistered NFC tag and may transmit the notification signal to the wireless access point 400. [ The wireless access point 400 may transmit the notification signal to the server 500 via the network.

In Case 2 (CASE 2), the server 500 can transmit an alarm signal to the door opening / closing confirmation device 100 through the network and the wireless access point 400. Therefore, the door opening / closing confirmation apparatus 100 can operate the alarm.

When the door is opened in a normal way (CASE 3), the door opening / closing confirmation device 100 detects reflected waves reflected from the floor or an object (i.e., reflected waves related to the detection signal output from the door opening / closing device 100) . In addition, the door opening / closing confirmation apparatus 100 may receive an opening / closing signal indicating door opening from the door opening / closing apparatus 300.

The door opening / closing confirmation device 100 receives the reflected wave, generates a notification signal indicating the opening of the door, and transmits the notification signal and the opening / closing signal to the server 500 through the network with the wireless access point 400 have. In Case 3 (CASE 3), the server 500 does not transmit an alarm signal to the door opening / closing confirmation device 100. Therefore, the alarm of the door opening / closing confirmation apparatus 100 does not operate.

When the door is opened in an abnormal manner (CASE 4), the door opening / closing confirmation apparatus 100 detects reflected waves reflected from the floor or an object (i.e., reflected waves related to the detection signal output from the door opening / closing apparatus 100) . Also, the door opening / closing confirmation device 100 may receive an opening / closing signal indicating door closing from the door opening / closing device 300.

The door opening / closing confirmation device 100 receives the reflected wave, generates a notification signal indicating the opening of the door, and transmits the notification signal and the opening / closing signal to the server 500 through the network with the wireless access point 400 . In Case 4 (CASE 4), the server 500 can transmit an alarm signal to the door opening / closing confirmation device 100 through the network and the wireless access point 400. Therefore, the door opening / closing confirmation device 100 operates the alarm.

3 is a block diagram of a door opening / closing confirmation device according to an embodiment of the present invention. 1 to 3, the door opening / closing confirmation apparatus 100 includes an NFC transceiver 110, a memory 120, a key generator 130, an NFC writer 140, an NFC reader 150, A controller 160, a controller 170, and an alarm 180. The door opening / closing confirmation apparatus 100 may further include a random number generator 190.

The NFC transceiver 110 may refer to a hardware module that forms a magnetic field between the NFC transceiver 110 and the first NFC tag 200 and transmits and receives data using the magnetic field. The NFC transceiver 110 converts the data output from the NFC writer 140 into a wireless signal and transmits the wireless signal to the first NFC tag 200 or the wireless signal transmitted from the first NFC tag 200, And outputs the data corresponding to the signal to the NFC reader 150.

For example, the NFC transceiver 110 transmits an encrypted ID (ID) output by the NFC writer 140 to the first NFC tag 200 to register the first NFC tag 200 in the door opening / To the first NFC tag (200). The NFC transceiver 110 may also transmit the detection signal DES output from the NFC reader 140 to the first NFC tag 200 in order to recognize the first NFC tag 200.

The memory 120 stores the ID of the first NFC tag 200 generated by the NFC writer 140 and the ID for identifying the first NFC tag 200 under the control of the controller 170 An encryption key (KEY) used, an ID encrypted by the encryption key (KEY), and / or an encryption algorithm. For example, the door opening / closing confirmation apparatus 100 may use a symmetric encryption algorithm such as an advanced encryption standard (AES) encryption / decryption library. The memory 1120 may be implemented as a non-volatile memory.

The key generator 130 may generate an encryption key (KEY) for encrypting the ID of the first NFC tag 200 or decrypting the encrypted ID transmitted from the first NFC tag 200. Since the embodiment of the present invention can use the symmetric key method, it is possible to encrypt the ID of the first NFC tag 200 using one cipher key (KEY) or decrypt the encrypted ID transmitted from the first NFC tag 200 . The generated encryption key (KEY) can be stored in the memory (120) under the control of the controller (170).

The NFC writer 140 can generate an NFC tag ID for identifying the first NFC tag 200 under the control of the controller 170. [ The NFC writer 140 can encrypt the NFC tag ID using the encryption key (KEY) output from the key generator 130. The NFC writer 140 outputs the encrypted NFC tag ID to the NFC transceiver 110 and the NFC transceiver 110 can transmit the encrypted NFC tag ID to the first NFC tag 200. [

For the write operation (WRITE), the NFC writer 140 may transmit the detection signal DES to the first NFC tag 200 via the NFC transceiver 110. The NFC writer 140 can write the encrypted NFC tag ID into the first NFC tag 200 so that the first NFC tag 200 can be registered as the NFC tag of the door opening /

According to the control of the controller 170, the NFC writer 140 may be enabled and the NFC reader 150 may be disabled for a write operation (WRITE). When the registration operation for the first NFC tag 200 is completed, the NFC writer 140 can transmit a registration completion signal to the controller 170. The controller 170 may then disable the NFC writer 140 and enable the NFC reader 150. In registering a new NFC tag, the controller 170 responds to the registration signal transmitted from the server 500 via the wireless communication module 160 to enable the NFC writer 140 for the write operation (WRITE) And the NFC reader 150 may be disabled.

The enabled NFC reader 150 may transmit the detection signal DES to the first NFC tag 200 via the NFC transceiver 110. [ The enabled NFC reader 150 receives the response signal RES output from the first NFC tag 200 through the NFC transceiver 110 and receives the response signal RES, (KEY) is automatically read, and the response signal (RES) can be decoded using the read cipher key (KEY). At this time, the response signal RES includes the NFC tag ID encrypted by the door opening / closing confirmation device 100. [

The NFC reader 150 compares the decoded response signal RES, i.e., the decoded NFC tag ID with the ID read from the memory 120, and outputs an acknowledge signal CON indicating whether the door is opened or closed according to the comparison result And outputs an acknowledgment signal CON to the controller 170.

The wireless communication module 160 can control signals transmitted between the door opening / closing device 100 and the wireless access point 400. In accordance with embodiments, the wireless communication module 160 may communicate with the wireless access point 400 in a wireless communication manner such as Wi-Fi, Bluetooth, BLE, or ZigBee.

As described above, the controller 170 can control the enable of either the NFC writer 140 or the NFC reader 150. The controller 170 can receive the open / close signal OCS output from the door opening / closing apparatus 300 and receive the confirmation signal CON from the NFC reader 150. [ The controller 170 can transmit a notification signal including the open / close signal OCS and the confirmation signal CON to the wireless communication module 160.

The controller 170 receives the alarm signal output from the server 500 from the wireless communication module 160 and can control the operation of the alarm 160 in response to the alarm signal.

Under the control of the controller 170, the alarm device 180 outputs an alarm sound to notify that the response signal is received from the unregistered second NFC tag 200-1 or that the door has been abnormally opened. At this time, the controller 170 can transmit a notification signal to the wireless access point 400 through the wireless communication module 160. [

The random number generator 190 can generate a random number for generating the encryption key (KEY). The key generator 130 may generate the cryptographic key KEY using the random number generated by the random number generator 190. For example, the key generator 130 and the random number generator 190 may be packaged into one secure module.

4 is a flowchart illustrating an operation of the door opening / closing confirmation device shown in FIG.

1 to 4, the door opening / closing confirmation device 100 generates the ID of the first NFC tag 200 and stores the generated ID in the memory 120 inside the door opening / closing confirmation device 100 The ID can be encrypted using the encryption key KEY in the door opening / closing confirmation apparatus 100, and the encrypted ID can be written in the first NFC tag 200 (S100). For example, the door opening / closing confirmation device 100 may generate the ID of the first NFC tag 200 under the control of the server 500.

The door opening / closing confirmation apparatus 100 can transmit the detection signal DES to the first NFC tag 200, the second NFC tag 200-1 or the bottom surface (or the object), and the first NFC tag 200, 2NFC tag 200-1 or a response signal RES related to the detection signal DES from the floor (or object) (S110).

The door opening / closing confirmation apparatus 100 decrypts the response signal RES using the encryption key KEY and stores the decrypted response signal RES in the memory 120 inside the door opening / The IDs can be compared (S120). The decoded response signal RES may or may not include the ID of the first NFC tag 200.

The door opening / closing confirmation device 100 generates an acknowledgment signal CON indicating whether the door is opened or closed according to the comparison result, and generates an acknowledgment signal CON based on the confirmation signal CON and the open / close signal output from the door opening / The notification signal may be transmitted to the server 500 through the wireless access point 400 and the network (S130).

The server 500 may transmit an alarm message to the manager's wireless communication device managing the security for the door opening / closing confirmation device 100 in response to the notification signal.

The door opening / closing confirmation device 100 may operate the alarm 180 of the door opening / closing confirmation device 100 in response to the alarm signal received from the server 500. [

When the first NFC tag 200 in which the NFC tag communicated with the door opening / closing confirmation device 100 is registered, the server 500 does not output an alarm signal and thus the alarm 180 does not operate One).

When the NFC tag communicating with the door opening / closing confirmation device 100 is an NFC tag that is not registered, that is, the second NFC tag 200-1, the server 500 outputs an alarm signal, so that the alarm 180 operates CASE 2 in FIG. 2).

The server 500 does not output an alarm signal when the door opening / closing signal is normally opened and the door opening / closing confirmation device 100 receives the response signal RES from the floor (or object) The alarm 180 is not activated (CASE 3 in FIG. 2).

When the door opening / closing signal indicates that the door is closed because the door is abnormally opened and the door opening / closing confirmation device 100 receives the response signal RES from the floor (or object), the server 500 outputs an alarm signal, The alarm 180 is activated (CASE 4 in FIG. 2).

As described with reference to FIG. 2, the controller 170 can operate the alarm 180 based on the opening / closing signal OCS and the confirmation signal CON, as in case 1 (CASE1) to case 4 (CASE4) have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Security system
100: Checking whether the door is opened or closed
110: NFC transceiver
120: Memory
130: key generator
140: NFC writer
150: NFC reader
160: Wireless communication module
170: Controller
180: Alarm
190: random number generator
200: First NFC tag (registered tag)
200-1: second NFC tag (unregistered tag)
300: Door opening / closing device
400: Wireless access point
500: Server

Claims (12)

A door opening / closing confirmation device for determining whether the door is opened or closed through communication with a first NFC tag installed at a door,
NFC transceiver;
Memory;
A key generator for generating an encryption key;
The method comprising: generating an ID of the first NFC tag, storing the ID in the memory, reading the ID from the memory, encrypting the ID using the encryption key, and writing the encrypted ID into the first NFC tag An NFC writer for transmitting the encrypted ID to the NFC transceiver;
Receiving the response signal through the NFC transceiver, decrypting the response signal using the encryption key, comparing the decrypted response signal with the ID, generating an acknowledgment signal indicating whether the door is opened or closed according to a result of the comparison An NFC reader;
A wireless communication module capable of communicating with a wireless access point capable of communicating with a server; And
And a controller for controlling the enable of either the NFC writer or the NFC reader and transmitting a notification signal corresponding to the confirmation signal to the wireless communication module. The method according to claim 1,
When the response signal is a signal transmitted from the first NFC tag and the decoded ID included in the decoded response signal matches the ID, the NFC reader generates the confirmation signal indicating the closing of the door,
Wherein the controller transmits the notification signal corresponding to the confirmation signal indicating the closing of the door to the wireless communication module. The method according to claim 1,
When the response signal is a signal transmitted from a second NFC tag different from the first NFC tag, and the decoded ID included in the decoded response signal is different from the ID, the NFC reader transmits the acknowledgment Signal,
Wherein the controller transmits the notification signal corresponding to the confirmation signal indicating the contact of the unregistered NFC tag to the wireless communication module. The method of claim 3,
Wherein the controller controls the operation of the alarm in response to the alarm signal received through the wireless communication module. The method according to claim 1,
When the response signal is a signal reflected from a floor or an object and the decoded ID included in the decoded response signal is different from the ID, the NFC reader generates the confirmation signal indicating opening of the door,
Wherein the controller transmits the notification signal against the confirmation signal indicating opening of the door to the wireless communication module. 6. The apparatus of claim 5,
Closing signal output from the door opening / closing device for controlling the opening and closing of the door,
Wherein the opening / closing signal and the notification signal are transmitted to the wireless communication module. The method according to claim 6,
Wherein the controller controls the operation of the alarm in response to the alarm signal received through the wireless communication module. The method according to claim 1,
And a random number generator for generating a random number using a secret value,
Wherein the key generator generates the encryption key using the random number. A door opening / closing confirmation device for determining whether the door is opened / closed through communication with a first NFC tag installed at a door;
A wireless access point capable of wireless communication with the door opening / closing confirmation device;
And a server capable of communicating with the wireless access point via a network,
The door opening / closing confirmation device includes:
NFC transceiver;
Memory;
A key generator for generating an encryption key;
The method comprising: generating an ID of the first NFC tag, storing the ID in the memory, reading the ID from the memory, encrypting the ID using the encryption key, and writing the encrypted ID into the first NFC tag An NFC writer for transmitting the encrypted ID to the NFC transceiver;
Receiving the response signal through the NFC transceiver, decrypting the response signal using the encryption key, comparing the decrypted response signal with the ID, generating an acknowledgment signal indicating whether the door is opened or closed according to a result of the comparison An NFC reader;
A wireless communication module for performing the wireless communication with the wireless access point; And
And a controller for controlling the enable of either the NFC writer or the NFC reader and transmitting a notification signal corresponding to the confirmation signal to the wireless communication module. 10. The method of claim 9,
When the response signal is a signal transmitted from the first NFC tag and the decoded ID included in the decoded response signal matches the ID, the NFC reader generates the confirmation signal indicating the closing of the door,
The controller transmits the notification signal corresponding to the confirmation signal indicating the closing of the door to the wireless communication module,
When the response signal is a signal transmitted from a second NFC tag different from the first NFC tag, and the decoded ID included in the decoded response signal is different from the ID, the NFC reader transmits the acknowledgment Signal,
The controller transmits the notification signal corresponding to the confirmation signal indicating the contact of the unregistered NFC tag to the wireless communication module,
When the response signal is a signal reflected from an object and the decoded ID included in the decoded response signal is different from the ID, the NFC reader generates the confirmation signal indicating opening of the door,
Wherein the controller transmits the notification signal against the confirmation signal indicating opening of the door to the wireless communication module. 11. The method of claim 10,
The server responds to the notification signal corresponding to the confirmation signal indicating the contact of the unregistered NFC tag received via the network with the wireless access point or the notification signal corresponding to the confirmation signal indicating the opening of the door Generates an alarm signal,
Wherein the controller operates the alarm in response to the alarm signal received via the network, the wireless access point, and the wireless communication module. 12. The method of claim 11,
Wherein the server transmits an alarm message corresponding to the alarm signal to a wireless communication device of a security manager managing the door opening / closing confirmation device.
KR1020150148498A 2015-10-26 2015-10-26 Device for detecting door opening and closing using nfc tag and security system including the same KR101762625B1 (en)

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